Relationship between colors and solar transmittance, reflectance and absorptance of clothing

Solar transmittance τcl, reflectance ρcl and absorptance αcl of eight different colors of clothing were measured. Solar transmittance increased and reflectance decreased with decreasing solar incidence angle to clothing. Solar absorptance was nearly constant regardless of solar' incidence angle. The relationships between colors of clothing and solar transmittance, reflectance and absorptance were studied. Solar reflectance was expressed as a linear function of Munsell value regardless of hue and chroma. Solar transmittance, reflectance and absorptance were expressed as a function of luminance reflectance Y τcl= 0.146 + 0.0017 Y ρcl = 0.320+ 0.0052 Y, αcl= 0.535 - 0.0069 Y.